[Buildroot] [PATCH 1/1] package/libcap: fix regression for static linking issue

[Heiko Thiery <heiko.thiery@gmail.com>]

9c13e02c35c74eca56e69f2bbfde452b51860f5e already fixed the static linking
issue for host-libcap on some distros (e.g. on Fedora32 and openSUSE).

This regression was introduced by 8d38eb052e7006b6e74e9453351d7f245144481e.

An upstream patch [1] is added to address this problem [2].

Fixes:
Bug 13296

[1] https://git.kernel.org/pub/scm/libs/libcap/libcap.git/commit/?id=9b1c003748d4df78416d50fce139f0875224440b
[2] https://bugzilla.kernel.org/show_bug.cgi?id=210135

Cc: Peter Seiderer <ps.report@gmx.net>
Cc: Dr I J Ormshaw <ian_ormshaw@waters.com>
Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
---
 ...ding-progs-tcapsh-static-to-sudotest.patch | 79 +++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 package/libcap/0001-Migrate-building-progs-tcapsh-static-to-sudotest.patch

diff --git a/package/libcap/0001-Migrate-building-progs-tcapsh-static-to-sudotest.patch b/package/libcap/0001-Migrate-building-progs-tcapsh-static-to-sudotest.patch
new file mode 100644
index 0000000000..856b7b1bbf
--- /dev/null
+++ b/package/libcap/0001-Migrate-building-progs-tcapsh-static-to-sudotest.patch
@@ -0,0 +1,79 @@
+From 9b1c003748d4df78416d50fce139f0875224440b Mon Sep 17 00:00:00 2001
+From: "Andrew G. Morgan" <morgan@kernel.org>
+Date: Tue, 10 Nov 2020 20:47:45 -0800
+Subject: [PATCH] Migrate building progs/tcapsh-static to sudotest
+
+This addresses:
+
+  https://bugzilla.kernel.org/show_bug.cgi?id=210135
+  https://bugs.busybox.net/show_bug.cgi?id=13296
+
+Some notes on expectations:
+
+When building DYNAMIC=yes folk want to avoid depending on a
+static libc.a file in their build tree. The best we can do is
+to move building static test tool objects to sudotest.
+
+  make DYNAMIC=yes clean all test
+
+will build the progs binaries and run the tests with all dynamic
+linking. It will, however, build the libcap.a etc libraries too
+even though they are not used for linking.
+
+  make DYNAMIC=no clean all test
+
+will build the progs binaries and run the tests with all static
+linking. It will, however, build the libcap.so etc libraries too
+even though they are not used for linking.
+
+  make SHARED=no clean all test
+
+will build and link progs and test binaries statically against
+libcap.a. No shared libraries (libcap.so etc) will be built.
+
+In all cases, whether linked against or not, libcap.a is built.
+
+Signed-off-by: Andrew G. Morgan <morgan@kernel.org>
+[Patch taken from upstream:
+https://git.kernel.org/pub/scm/libs/libcap/libcap.git/commit/?id=9b1c003748d4df78416d50fce139f0875224440b]
+Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
+---
+ tests/Makefile | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/tests/Makefile b/tests/Makefile
+index fc39fee..1e7039d 100644
+--- a/tests/Makefile
++++ b/tests/Makefile
+@@ -17,13 +17,13 @@ install: all
+ 
+ ifeq ($(DYNAMIC),yes)
+ LINKEXTRA=-Wl,-rpath,../libcap
+-DEPS=../libcap/libcap.so ../progs/tcapsh-static
++DEPS=../libcap/libcap.so
+ ifeq ($(PTHREADS),yes)
+ DEPS += ../libcap/libpsx.so
+ endif
+ else
+ LDFLAGS += --static
+-DEPS=../libcap/libcap.a ../progs/tcapsh-static
++DEPS=../libcap/libcap.a
+ ifeq ($(PTHREADS),yes)
+ DEPS +=  ../libcap/libpsx.a
+ endif
+@@ -71,10 +71,10 @@ libcap_psx_test: libcap_psx_test.c $(DEPS)
+ 	$(CC) $(CFLAGS) $(IPATH) $< -o $@ $(LINKEXTRA) $(LIBCAPLIB) $(LIBPSXLIB) $(LDFLAGS)
+ 
+ # privileged
+-run_libcap_launch_test: libcap_launch_test noop
++run_libcap_launch_test: libcap_launch_test noop ../progs/tcapsh-static
+ 	sudo ./libcap_launch_test
+ 
+-run_libcap_psx_launch_test: libcap_psx_launch_test
++run_libcap_psx_launch_test: libcap_psx_launch_test ../progs/tcapsh-static
+ 	sudo ./libcap_psx_launch_test
+ 
+ libcap_launch_test: libcap_launch_test.c $(DEPS)
+-- 
+2.20.1
+
-- 
2.20.1